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Foamed ceramic material and preparation method thereof

A technology of foam ceramics and ceramic powder, which is applied in the field of porous ceramics, can solve the problems of long production cycle, many processes, and high production cost of foam ceramics, and achieve the effects of enhanced temperature resistance, high strength, and improved foaming efficiency

Inactive Publication Date: 2017-05-10
郑州峰泰纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs opening treatment, many procedures, high production cost and long production cycle of foamed ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The ceramic powder is composed of 70wt% of silicon nitride, 20wt% of bentonite, 5wt% of fly ash, 1wt% of aluminum oxide and 4wt% of talcum powder.

[0023] The foaming agent is composed of 30wt% of dolomite, 35wt% of calcium carbonate, 10wt% of calcium sulfate, 15wt% of carbon powder and 10wt% of silicon powder.

[0024] A foamed ceramic material comprises the following raw materials: 40wt% of ceramic powder, 5wt% of silica sol, 6wt% of foaming agent, 2wt% of sodium tannate, and the balance is water.

[0025] The preparation method of foam ceramic material comprises the following steps:

[0026] 1) Preparation of ceramic slurry: Add dispersant to water for microwave ultrasonic dispersion to obtain viscous liquid, then add ceramic powder and silica sol to the viscous liquid and mix evenly, then add foaming agent, stir mechanically for 10 minutes, and obtain ceramic slurry;

[0027] 2) pouring the ceramic slurry in step 1) into a mold, and placing it in an environment of...

Embodiment 2

[0030] The ceramic powder is composed of 80wt% silicon nitride, 10wt% bentonite, 5wt% fly ash, 4wt% aluminum oxide and 1wt% talcum powder.

[0031] The foaming agent is composed of 40 wt% of dolomite, 30 wt% of calcium carbonate, 10 wt% of calcium sulfate, 10 wt% of carbon powder and 10 wt% of silicon powder.

[0032] A foamed ceramic material comprises the following raw materials: 50 wt% of ceramic powder, 10 wt% of silica sol, 10 wt% of foaming agent, 3 wt% of potassium polyacrylate, and the balance is water.

[0033] The preparation method of foam ceramic material comprises the following steps:

[0034] 1) Preparation of ceramic slurry: Add dispersant to water for microwave ultrasonic dispersion to obtain viscous liquid, then add ceramic powder and silica sol to the viscous liquid and mix evenly, then add foaming agent, stir mechanically for 20 minutes, and obtain ceramic slurry;

[0035] 2) pouring the ceramic slurry in step 1) into a mold, and placing it in an environmen...

Embodiment 3

[0038] The ceramic powder is composed of 80wt% silicon nitride, 10wt% bentonite, 5wt% fly ash, 2wt% aluminum oxide and 3wt% talcum powder.

[0039] The foaming agent is composed of 50wt% of dolomite, 25wt% of calcium carbonate, 5wt% of calcium sulfate, 15wt% of carbon powder and 5wt% of silicon powder.

[0040] The preparation method of foam ceramic material comprises the following steps:

[0041] 1) Preparation of ceramic slurry: Add dispersant to water for microwave ultrasonic dispersion to obtain viscous liquid, then add ceramic powder and silica sol to the viscous liquid and mix evenly, then add foaming agent, stir mechanically for 30 minutes, and obtain ceramic slurry;

[0042] 2) pouring the ceramic slurry in step 1) into a mold, and placing it in an environment of 100° C. to solidify and dry to obtain a green body;

[0043] 3) The green body in step 2) is put into a sintering furnace, then the temperature is raised from room temperature to 1120° C. at 10° C. / min, sinte...

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Abstract

The invention provides a foamed ceramic material and a preparation method thereof. The foamed ceramic material comprises, by weight, 40-60% of ceramic powder, 5-15% of silica sol, 6-18% of foaming agents, 2-6% of dispersing agents and the balance water. The ceramic powder comprises, by weight, 70-80% of silicon nitride, 10-20% of bentonite, 5-10% of coal ash, 1-5% of aluminum oxide and 1-5% of talcum powder. According to the preparation method, a ceramic sizing agent is prepared and is dried to obtain a blank, and the blank is sintered to obtain the foamed ceramic material. The foamed ceramic material has a uniform structure, and product performance stability can be improved while production cycle is shortened.

Description

technical field [0001] The invention belongs to the technical field of porous ceramics, and in particular relates to a foam ceramic material and a preparation method thereof. Background technique [0002] Foam ceramics are porous ceramics shaped like foam. It has three-dimensional interconnected pores, and its shape, pore size, permeability, surface area and chemical properties can be adjusted appropriately. Foamed ceramics have attracted increasing attention due to their special properties, such as high specific surface area, high permeability, low bulk density, and low thermal conductivity. These excellent properties make it widely used in catalyst carrier, molten metal filtration, high temperature gas filtration, refractory materials, biological materials and other fields. [0003] Foam ceramics use polyurethane foam as the carrier, immerse it in the slurry made of ceramic powder, binder, sintering aid, suspending agent, etc., and then squeeze out the excess slurry, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B35/584C04B35/64
CPCC04B38/02C04B35/584C04B35/64C04B2235/3217C04B2235/349C04B2235/422C04B2235/428C04B2235/442C04B2235/448C04B2235/96
Inventor 李洋洋
Owner 郑州峰泰纳米材料有限公司
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